- May 1, 2022
- Jul 8, 2021
- Oct 13, 2017
- Richterite
- IMA Ideal Chemistry changed from "Na2CaMg5Si8O22(OH)2" to "Na(NaCa)Mg5Si8O22(OH)2"
- May 18, 2009
- Mar 29, 2008
- Richterite
- IMA Ideal Chemistry changed from "Na(CaNa)Mg5Si8O22(OH)2" to "Na2CaMg5Si8O22(OH)2"
- Dec 9, 2006
- Richterite
- RRUFF Ideal Chemistry changed from "Na[NaCa](Mg,Fe2+)5Si8O22(OH)2" to "Na(CaNa)Mg5Si8O22(OH)2"
- IMA Ideal Chemistry changed to "Na(CaNa)Mg5Si8O22(OH)2"
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